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AUSCERT External Security Bulletin Redistribution
ESB-2020.3556
Advisory (icsa-20-287-05) Siemens Desigo Insight
15 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Siemens Desigo Insight
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Unauthorised Access -- Remote/Unauthenticated
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-15794 CVE-2020-15793 CVE-2020-15792
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-20-287-05
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ICS Advisory (ICSA-20-287-05)
Siemens Desigo Insight
Original release date: October 13, 2020
Legal Notice
All information products included in https://us-cert.gov/ics are provided"as
is" for informational purposes only. The Department of Homeland Security (DHS)
does not provide any warranties of any kind regarding any information contained
within. DHS does not endorse any commercial product or service, referenced in
this product or otherwise. Further dissemination of this product is governed by
the Traffic Light Protocol (TLP) marking in the header. For more information
about TLP, see https://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 5.4
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Siemens
o Equipment: Desigo Insight
o Vulnerabilities: SQL Injection, Improper Restriction of Rendered UI Layers
or Frames, Exposure of Sensitive Information to an Unauthorized Actor
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
retrieve or modify data and gain access to sensitive information.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following Siemens products are affected:
o Desigo Insight: All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN SQL COMMAND ('SQL
INJECTION') CWE-89
The web service does not properly apply input validation for some query
parameters, which may allow an attacker to retrieve data via a content based
blind SQL injection attack.
CVE-2020-15792 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:L/I:N/A:N ).
3.2.2 IMPROPER RESTRICTION OF RENDERED UI LAYERS OR FRAMES CWE-1021
The affected product is vulnerable to clickjacking, which may allow an attacker
to retrieve or modify data in the context of a legitimate user by tricking that
user to click on a website controlled by the attacker.
CVE-2020-15793 has been assigned to this vulnerability. A CVSS v3 base score of
5.4 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:R/S:U/
C:L/I:L/A:N ).
3.2.3 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
The affected product is vulnerable to exposure of sensitive information, which
may allow an attacker to retrieve additional information about the host system.
CVE-2020-15794 has been assigned to this vulnerability. A CVSS v3 base score of
4.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:L/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple Sectors
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
3.4 RESEARCHER
Davide De Rubeis, Damiano Proietti, Matteo Brutti, Stefano Scipioni, and
Massimiliano Brolli from TIM Security Red Team Research reported these
vulnerabilities to Siemens.
4. MITIGATIONS
Siemens has identified the following specific workarounds and mitigations users
can apply to reduce risk:
o Update to v6.0 SP5 and apply Hotfix 2 or later.
o Disable Desigo Insight Web, if not used.
o Restrict the access to allow only authorized users to access the web
applications.
o Only access links from trusted sources in the browser used to access Desigo
Insight Web.
As a general security measure Siemens strongly recommends protecting network
access to affected products with appropriate mechanisms. It is advised to
follow recommended security practices and run the devices in a protected IT
environment.
For additional information, please refer to Siemens Security Advisory
SSA-226339
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls, and
isolate them from the business network.
o When remote access is required, use secure methods, such as Virtual Private
Networks (VPNs), recognizing that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the connected devices.
CISA reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices
on the ICS webpage on us-cert.gov . Several recommended practices are available
for reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies .
Additional mitigation guidance and recommended practices are publicly available
on the ICS webpage on us-cert.gov in the Technical Information Paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to CISA for tracking
and correlation against other incidents.
For any questions related to this report, please contact the CISA at:
Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by
choosing one of the links below to provide feedback about this product.
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